学java数组崩溃的第二天

public class HelloWorld {
    public static void main(String[] args) {
        int[] a = new int[5];
        for (int i = 0; i < a.length; i++){
            a[i] = (int) (Math.random()*100);
            System.out.print(a[i] + " ");
        }

        for (int j = 0; j < a.length; j++){
            for (int i = 1; i < a.length - j; i++){
                if (a[i-1] > a[i]){
                    int b = a[i-1];
                    a[i-1] = a[i];
                    a[i] = b;
                }
             }
        }

        System.out.println();
        for (int i = 0; i < a.length; i++){
            System.out.print(a[i] + " ");
        }


        }
}